Chair for concrete reenforcement stirrups



July 14, 1931. A: L. NEELY ET AL 1,314,007

CHAIR FOR CONCRETE REENFORCEMENT STIRRUPS Filed April 11, 1930 Inventors 7 A llomey Patented July 14, 1931 i UNITED STATES CHAIR non CONCRETE nnnnroncniunn'r s'rrmwrs Application filed 'April 11,

This invention relates to means for supporting the stirrups of concrete reenforcements at a predetermined spaced distance from the side Walls of the knock-down form or other temporary supporting structure as used in constructing reinforced concrete beams.

A still further object of the invention is to provide a chair of the character above mentioned which is comparatively simple in construction, strong. durable, practical, thoroughly reliable and eflicient in operation and otherwise well adapted for the purpose designed.

The above and numerous other objects and advantages of the invention will become apparent during a study of the following description, taken in connection with the accompanying drawings, wherein I Figure 1 is a fragmentary perspective view of a concrete form and reinforcing structure for illustrating the application of my invention thereto. v

Figure 2 is a fragmentary detail perspec tive view of the stirrup chair.

Figure 3 is a plan view of the chair.

With reference more in detail to the drawings, it will be seen that I have designated generally by the reference character F a knock-down form such as is used for forming reinforcing concrete beams, and arranged in the form of the usual well known manner are the reinforcing rods R and the conventional type of stirrups designated by the reference character S.

The primary object of my invention is in the provision of a chair for the upstanding le S of the stirrups for spacing the legs a suitable distance such as for example threequarters of an inch from the inside of the vertical walls of the form, and to this end the chair designated generally by the reference character C is formed from a suitable blanksheet of metal of elongated rectangular configuration, which metal intermediate its longitudinal edges is bulged or pressed outwardly to provide a convex reinforcing rib 5 extending for the full length of the blank. The blank is so shaped and bent as to provide a substantially U-shaped intermediate 1930'. Seria1 Noi 443A98. V I

portimi'fi constituting a seat for receiving the leg of the stirrup S, said U-shaped seat 6 embodying the spaced parallelyl'egs' '7 each of which inwardly from their free ends are bent outwardly in opposite directions as at 8 to provide 'rearwardly extending diverging end extensions 9, the free end edges of which extensions. are adapted to a at the wall of the form for spacing the U shaped seatlaterally with respect to the wall, as clearly-suggested in Figure 1. The bight portion of the seat 6 intermediate its end is suitably perforated or otherwise provided with an opening 10 adapted to receive a fastening device such as a nail 11 of suitable length adapted to be driven into the wall of the form for securing the chair in fixed position relative to the form.

In this connection it will be noted that the end extensions 9 are of such length as to space the crown portion of the seat 6 from the wall of the forma desired distance from the inside of the form for supporting the stirrups in position while concrete is being poured; so as to insure the fact that no steel will be showing after the form is knocked down or wrecked as is apparent.

Manifestly when the concrete beam is completed and the form knocked down the chair remains in concrete and is not used again and there is no exposure of the steel whatsoever.

From the foregoing then, it will be seen that I have devised a simple, novel yet thoroughly practical and reliable chair for supporting in proper position the stirrups used in reinforced concrete beam construction and that the same will insure the proper embedding of the stirrups in the concrete so that at the completion of the beam there will be no steel showing. Furthermore, that the use of a chairof this character will obviate the necessity of employing a man to watch the chair while the concrete is being poured as has heretofore been the practice thus saving labor and reducing the cost of constructing the concrete beams.

It is thought that from the foregoing description, taken in connection with the ac- PA NT E-'1 companying drawing, a clear understanding of the operation, construction, utility and advantages of an invention of this character will be had by those skilled in the art Without a more detailed description.

Even though I have herein shown and de scribed the preferred embodiment of my invention, it is to be understood that the same is susceptible to changes in size, material used and arrangement of parts without departing from the spirit of the invention asherein described, and the scope of the appended claim.

Having thus described my invention, what I wish to claim as new is 1- A chair for supporting and spacing the vertical legs of a stirrup used in reinforced concrete beam construction comprising a strip of metal provided with a longitudinally extending strengthening rib, said metal being bent to provide a substantially U shaped seat, and the rib at the bight of said seat being provided with an opening for receiving a fastener for securing the chair in rigid position on a wall of the form.

In testimony whereof we affix our signatures.

ANDY L. NEELY. WILLIAM TOLLE. 

